10uf tantalum capcitor adxl375

Discussion in 'Embedded Systems and Microcontrollers' started by Vindhyachal Takniki, Jan 20, 2015.

  1. Vindhyachal Takniki

    Thread Starter Member

    Nov 3, 2014
    348
    6
    1. Adxl375 specifically mentioned about using 10uf tantalum capacitor on Vs.
    2. What the reason for that?
    3. What if I use 10uf ceramic for that.


    I have read on internet thet ceramic has below drawbacks:
    1. Aging
    2. Voltage coeff
    3. Piezeo noise
    4. Flex crack (most severe)


    After reading I guess since adxl375 is used for measuring accelration so most dominating reason to use 10uF tantalum will be piezo noise. Is it right?
    But along with 10uF tantalum, datasheet specify to use 0.1uF ceramic also, which may go opposite to my above reason.
    I want to know what exactly the reason for using tantalum here.
     
  2. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    7,386
    1,605
    One puts a large and small value cap in parallel because each is better at different things.

    Large value caps are better at low frequency. They bulk up the DC when large currents are drawn for a time.

    Small value caps are better at high frequency. They attenuate fast changes.
     
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